volk_32f_64f_add_64f.h

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/* -*- c++ -*- */
/*
 * Copyright 2018 Free Software Foundation, Inc.
 *
 * This file is part of VOLK
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later
 */
 
#ifndef INCLUDED_volk_32f_64f_add_64f_H
#define INCLUDED_volk_32f_64f_add_64f_H
 
#include <inttypes.h>
 
#ifdef LV_HAVE_GENERIC
 
static inline void volk_32f_64f_add_64f_generic(double* cVector,
                                                const float* aVector,
                                                const double* bVector,
                                                unsigned int num_points)
{
    double* cPtr = cVector;
    const float* aPtr = aVector;
    const double* bPtr = bVector;
    unsigned int number = 0;
 
    for (number = 0; number < num_points; number++) {
        *cPtr++ = ((double)(*aPtr++)) + (*bPtr++);
    }
}
 
#endif /* LV_HAVE_GENERIC */
 
#ifdef LV_HAVE_NEONV8
#include <arm_neon.h>
 
static inline void volk_32f_64f_add_64f_neon(double* cVector,
                                             const float* aVector,
                                             const double* bVector,
                                             unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int half_points = num_points / 2;
 
    double* cPtr = cVector;
    const float* aPtr = aVector;
    const double* bPtr = bVector;
 
    float64x2_t aVal, bVal, cVal;
    float32x2_t aVal1;
    for (number = 0; number < half_points; number++) {
        // Load in to NEON registers
        aVal1 = vld1_f32(aPtr);
        bVal = vld1q_f64(bPtr);
        __VOLK_PREFETCH(aPtr + 2);
        __VOLK_PREFETCH(bPtr + 2);
        aPtr += 2; // q uses quadwords, 4 floats per vadd
        bPtr += 2;
 
        // Vector conversion
        aVal = vcvt_f64_f32(aVal1);
        // vector add
        cVal = vaddq_f64(aVal, bVal);
        // Store the results back into the C container
        vst1q_f64(cPtr, cVal);
 
        cPtr += 2;
    }
 
    number = half_points * 2; // should be = num_points
    for (; number < num_points; number++) {
        *cPtr++ = ((double)(*aPtr++)) + (*bPtr++);
    }
}
 
#endif /* LV_HAVE_NEONV8 */
 
#ifdef LV_HAVE_AVX
 
#include <immintrin.h>
#include <xmmintrin.h>
 
static inline void volk_32f_64f_add_64f_u_avx(double* cVector,
                                              const float* aVector,
                                              const double* bVector,
                                              unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int eighth_points = num_points / 8;
 
    double* cPtr = cVector;
    const float* aPtr = aVector;
    const double* bPtr = bVector;
 
    __m256 aVal;
    __m128 aVal1, aVal2;
    __m256d aDbl1, aDbl2, bVal1, bVal2, cVal1, cVal2;
    for (; number < eighth_points; number++) {
 
        aVal = _mm256_loadu_ps(aPtr);
        bVal1 = _mm256_loadu_pd(bPtr);
        bVal2 = _mm256_loadu_pd(bPtr + 4);
 
        aVal1 = _mm256_extractf128_ps(aVal, 0);
        aVal2 = _mm256_extractf128_ps(aVal, 1);
 
        aDbl1 = _mm256_cvtps_pd(aVal1);
        aDbl2 = _mm256_cvtps_pd(aVal2);
 
        cVal1 = _mm256_add_pd(aDbl1, bVal1);
        cVal2 = _mm256_add_pd(aDbl2, bVal2);
 
        _mm256_storeu_pd(cPtr,
                         cVal1); // Store the results back into the C container
        _mm256_storeu_pd(cPtr + 4,
                         cVal2); // Store the results back into the C container
 
        aPtr += 8;
        bPtr += 8;
        cPtr += 8;
    }
 
    number = eighth_points * 8;
    for (; number < num_points; number++) {
        *cPtr++ = ((double)(*aPtr++)) + (*bPtr++);
    }
}
 
#endif /* LV_HAVE_AVX */
 
#ifdef LV_HAVE_AVX
 
#include <immintrin.h>
#include <xmmintrin.h>
 
static inline void volk_32f_64f_add_64f_a_avx(double* cVector,
                                              const float* aVector,
                                              const double* bVector,
                                              unsigned int num_points)
{
    unsigned int number = 0;
    const unsigned int eighth_points = num_points / 8;
 
    double* cPtr = cVector;
    const float* aPtr = aVector;
    const double* bPtr = bVector;
 
    __m256 aVal;
    __m128 aVal1, aVal2;
    __m256d aDbl1, aDbl2, bVal1, bVal2, cVal1, cVal2;
    for (; number < eighth_points; number++) {
 
        aVal = _mm256_load_ps(aPtr);
        bVal1 = _mm256_load_pd(bPtr);
        bVal2 = _mm256_load_pd(bPtr + 4);
 
        aVal1 = _mm256_extractf128_ps(aVal, 0);
        aVal2 = _mm256_extractf128_ps(aVal, 1);
 
        aDbl1 = _mm256_cvtps_pd(aVal1);
        aDbl2 = _mm256_cvtps_pd(aVal2);
 
        cVal1 = _mm256_add_pd(aDbl1, bVal1);
        cVal2 = _mm256_add_pd(aDbl2, bVal2);
 
        _mm256_store_pd(cPtr, cVal1); // Store the results back into the C container
        _mm256_store_pd(cPtr + 4,
                        cVal2); // Store the results back into the C container
 
        aPtr += 8;
        bPtr += 8;
        cPtr += 8;
    }
 
    number = eighth_points * 8;
    for (; number < num_points; number++) {
        *cPtr++ = ((double)(*aPtr++)) + (*bPtr++);
    }
}
 
#endif /* LV_HAVE_AVX */
 
#endif /* INCLUDED_volk_32f_64f_add_64f_u_H */